Constraining neutrinoless double β decay matrix elements in 130Te

被引：1

作者：

McAllister, S. A. ^{[1
]}

Kay, B. P. ^{[2
]}

Freeman, S. J. ^{[1
]}

Schiffer, J. P. ^{[3
]}

Diebel, C. M. ^{[3
]}

Bloxham, T. ^{[4
]}

Howard, A. M. ^{[5
]}

Parker, P. D.

Sharp, D. K. ^{[1
,6
]}

Thomas, J. S. ^{[1
]}

机构：

[1] Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England

[2] Univ York, Dept Phys, York Y10 5DD, N Yorkshire, England

[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[4] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[5] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[6] Yale Univ, A W Wright Nucl Struct Lab, New Haven, CT 06520 USA

来源：

RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS, 2011 | 2012年 / 381卷

关键词：

TELLURIUM ISOTOPES;

D O I：

10.1088/1742-6596/381/1/012043

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

If a reliable measurement of a neutrinoless double beta decay (0 nu 2 beta) rate is made, the effective neutrino masses can be determined from the nuclear matrix element. Theoretical calculations of nuclear matrix elements, however, show some disagreement. To test the suitability of various theoretical models, they should be benchmarked against experimentally measured nuclear properties, such as the ground-state distribution of nucleons in the parent-daughter nuclei, and how they change as a result of the decay process. Single neutron-adding reactions have been performed on the 0 nu 2 beta candidate nucleus, Te-130. The Macfarlane-French sum rules have then been used to determine the single-particle vacancies. Some quasi-random phase approximations (QRPA) can greatly simplify theoretical calculations by describing the ground state of even-even nuclei using a BCS wavefunction. This assumption has been tested using two-neutron removal, (p,t) reactions. The BCS wavefunction appeared to be a valid approximation for valence neutrons.

引用

页数：4